The invention discloses a double-raceway yaw bearing of a large wind turbine unit, which comprises an outer ring and an inner ring, wherein an upper raceway is arranged between the outer ring and the inner ring; the upper raceway, which is a groove circular cross section combined by two semicircular grooves, and a plurality of upper steel balls and upper isolation blocks are arranged in the groove; a lower raceway, which is arranged below the upper raceway, is arranged between the outer ring and the inner ring, and the lower raceway is an isosceles right triangle groove embedded in the inner side of the outer ring and the outer side of the inner ring; and two grooves are combined with each other to form a groove with a square section, a plurality of lower steel balls, rollers and lower isolation blocks are arranged in the square groove, and the adjacent lower steel balls and the roller, the adjacent lower steel balls as well as the adjacent rollers are respectively separated by the lower isolation blocks. The yaw bearing disclosed by the invention aims at the process needs of extra large diameter yaw bearing, provides a yaw bearing equipped with upper and lower raceways of different shapes, thus maintaining the characteristics of reasonable price, high sensitivity of steel ball-type structure, and simultaneously exerting the advantages of multiple contact point, strong bearing capacity and high smoothness of roller-type structure efficiently.

Double-raceway yaw bearing of large wind turbine unit

The invention discloses a crossed roller and four-point sphere combined high-accuracy heavy-load slewing bearing. The heavy-load slewing bearing is provided with an outer ring, an inner ring and a sealing ring; two rows of parallel roller paths, namely a roller path I on the upper part and a roller path II on the lower part are arranged between the outer diametric surface of the inner ring and the inner diametric surface of the outer ring; steel spheres are arranged in the roller path I which is arc; the curvature radius of the roller path I is 0.55 time the diameter of the steel balls; an isolation block is arranged between every two steel spheres in the roller path I; crossed cylindrical rollers are arranged in the roller path II; and an isolation block is arranged between every two cylindrical rollers. The bearing has the advantages of saving installation space, along with compact structure, high slewing accuracy and bearing capacity, long service life, convenience in installation and the like, and is easy to maintain.

Crossed roller and four-point sphere combined high-accuracy heavy-load slewing bearing

The invention discloses an angular contact ball bearing unit for a driving wheel. The angular contact ball bearing unit comprises a hollow flanged shaft, an inner ring and an outer flange disc. The angular contact ball bearing unit is characterized in that a roll rim is arranged at the end part of the hollow flanged shaft; a step is arranged at the neck part of the hollow flanged shaft; the roll rim is used for fixing the inner ring on the shaft neck between the roll rim and the step in a positioning and riveting mode; a row of roller path is formed between the outer flange disc and the inner ring; a row of roller path is formed between the outer flange disc and the step at the neck part of the hollow flanged shaft; the two rows of roller paths are internally provided with roller bodies and holders; the inner ring is sleeved with a gear ring; the gear ring is coupled with a rotation speed sensor. According to the angular contact ball bearing unit, inner ring locking and play control can be achieved through positioning and riveting of the roll rim at the end part of the hollow flanged shaft, a fixing structure in which the inner ring is compressed by adopting a universal joint ball cage is replaced, the number of components of the hub bearing unit of an automobile driving wheel is reduced, the accumulated assembling errors are reduced, the overall rigidity is enhanced, the structure is compact, the assembling property is good, the inner ring is stably fixed, and moreover, the hub bearing unit is convenient to mount, adjust and maintain, high in loading capability, high in reliability and applicable to relatively severe working condition, and the play inside a bearing is accurate and can be preset and pre-tightened.

Angular contact ball bearing unit for driving wheel

The invention provides a bearing. The bearing comprises an outer ring (1), an inner ring (2) and multiple installation holes (3) located in the outer ring (1) and the inner ring (2) respectively. At least one of the multiple installation holes (3) in the outer ring (1) and/or the inner ring (2) is provided with a through hole (4), and the through hole (4) communicates with the installation holes (3) and the interior of the bearing. According to the bearing in the embodiment, rigidity and sealing performance can be improved, corrosion of the installation holes in the inner ring and the outer ring can be prevented, and the problem of grease leakage can be relived.

Bearing and variable-pitch bearing of wind generating set

A four-point contact ball slewing bearing convenient to demount comprises an outer ring, an inner ring, steel balls and a seal ring. Opposing faces of the outer ring and inner ring are provided with raceway grooves in which the steel balls roll. The seal ring is disposed between the outer ring and the inner ring. The face, opposite to the raceway grooves, of the inner ring is provided with plug holes disposed radially along the slewing bearing and communicated with the raceway grooves. The diameter of the plug holes is greater than that of the steel balls. Positioning holes and fixing holes are provided around the plug holes. A plug mounted in each plug hole is flange shaped, a flange face at one end of each plug is provided with a positioning pinhole and a screw hole, and the other end of the plug is provided with a groove matching with the raceway grooves of the inner ring in shape. The plugs are positioned by extending positioning pins through the positioning pinholes into the positioning holes and are fixed to the inner ring through screws. The steel balls of the slewing bearing can be replaced or the raceway grooves of the slewing bearing can be subjected to abrasion inspection just by removing the plugs without removing bolts which connect the inner and outer rings of the slewing bearing to a base of a rotating mechanism.

Four-point contact ball slewing bearing convenient to demount

The utility model relates to a cross roller and ball combined slewing bearing and belongs to slewing bearings. The cross roller and ball combined slewing bearing is characterized in that an upper raceway and a lower raceway are respectively arranged between an inner circumference face of an outer ring and an outer circumference face of an inner ring in a spaced manner, the upper raceway serves as a roller raceway, rollers and spacers of the rollers are sequentially mounted in the upper raceway uniformly, the lower raceway serves as a ball raceway, steel balls and spacers of the steel balls are sequentially mounted in the lower raceway, an upper plug hole and a lower plug hole are respectively arranged on the right of the outer ring radially and respectively slidably matched with cylindrical plugs, taper through holes are arranged on the upper plug and the lower plug and on the right of the outer ring and are matched with taper pins with the same taper, the upper plug and the lower plug are fixed on the outer ring, the outer ring and the inner ring of the slewing bearing are supported through the rollers and the steel balls and rotate relative to each other, and thereby bearing capacity of the slewing bearing is enhanced greatly and requirements for high performance and high load of a main unit are met.

Cross roller and ball combined slewing bearing

The utility model provides a three-row ball type pivoting support, which belongs to a pivoting support and is characterized in that an upper roller path, a middle roller path and a lower roller path which are provided with circular cross sections are evenly symmetrically arranged between the circumference of an inner circle of an outer ring and the circumference of an outer circle of an inner ring form top to bottom. An upper plug hole, a middle plug hole and a lower plug hole which are provided with the same diameter are respectively arranged at the right portion of the outer ring in the radial direction and slidingly respectively matched with installed cylindrical plugs. A through hole with the same cone is respectively arranged on the upper plug, the middle plug and the lower plug from top to bottom at the right portion of the outer ring, and taper pins with the same taper are installed in the through holes with the same cone so as to fix the upper plug, the middle plug and the lower plug on the outer ring. The outer ring and the inner ring of the pivoting support are supported to each other through three rows of steel balls and rotate relatively, thereby greatly improving bearing capacity of the pivoting support and achieving the purpose that the requirement of a host machine for high performance and high load can be satisfied under the condition that the size of the pivoting support is relatively fixed.

Handong Wang

Papers

Cross roller and ball combined slewing bearing

Three-row ball type pivoting support